Bradford White ICON System Features - Fully automatic controls - 3/4" NPT factory installed dielectric waterway fittings - Roof jack package for installation flexibility - Vitraglas lining - Protective magnesium anode rod - T&P relief valve opening - Low restriction brass drain valve - 1" Non-CFC foam insulation - Advanced Screenlok Technology Flame Arrestor Design - Resettable thermal switch - Piezo igniter - Pedestal base - Sight Window - Convertible Gas Control Valve